Phylogeny and diversity of Bjerkandera (Polyporales, Basidiomycota), including four new species from South America and Asia

Abstract

Four new species of Bjerkandera, viz. B. ecuadorensis, B. fulgida, B. minispora, and B. resupinataspp. nov., are described from tropical America and Asia. B. ecuadorensis is characterised by dark grey to black pore surface, a monomitic hyphal system, hyaline to yellowish-brown generative hyphae, and ellipsoid basidiospores measuring 3.9–4.5 × 2.7–3 μm. B. fulgida is distinguished from the other species in the genus by clay buff to pale brown and shiny pore surface. B. minispora is characterised by white tomentose pore mouth and small basidiospores measuring 3.1–4.2 × 2–2.8 μm. B. resupinata is characterised by resupinate basidiomata, pinkish buff to pale brownish pore surface, and ellipsoid to broadly ellipsoid basidiospores measuring 4.5–6 × 3.2–4.1 µm. All these new species grow on angiosperm trunks or rotten wood, and cause a white rot. The closely related taxa to four new species are discussed. An identification key to the ten accepted species of Bjerkandera is provided, and a phylogeny comprising all known Bjerkandera species is provided.

Bjerkandera carnegieae comb. nov. (Phanerochaetaceae, Polyporales) a wood-decay polypore of cactus

“…Our multi-gene phylogenetic tree of the phlebioid clade shown in Figure 1 is consistent with previous studies (Justo et al 2017;Chen et al 2018). Similarly, the ITS-LSU analysis of the genus Bjerkandera recovered a tree shown in Figure 2 that is congruent with that in Motato-Vásquez et al (2020) and Wang et al (2021). Phylogenetic studies showed that the current concept of Ceriporiopsis is polyphyletic with species recovered in several different phylogenetic clades (Tomšovský et al 2010;Zhao & Cui 2014;Gómez-Montoya et al 2017).…”

“…The ML tree is presented in Figure 2. In this ITS-LSU tree, C. carnegieae is in a basal position within Bjerkandera and consistent with previous work (Motato-Vásquez et al 2020;Wang et al 2021).…”

“…JV1512/13J (as Ceriporiopsis sp. in Wang et al 2021) and Bjerkandera sp. L13104sp, both from Costa Rica, are required to see if sequence data are also supported by morphological and biological characters to describe it as a new taxon.…”

“…Furthermore, the context in B. carnegieae is uniformly light-colored, whereas other species of Bjerkandera have a tan, brown or black zone or line between the base of the tubes or pores and context. Motato-Vásquez et al (2020) and Wang et al (2021) have summarized some critical morphological characters of accepted species in Bjerkandera and included keys.…”

“…In a multigene phylogenetic study of the order Polyporales by Justo et al (2017), C. carnegieae was recovered in a clade with two species of Bjerkandera in the Phanerochaetaceae. Subsequent phylogenetic studies confirmed and supported this relationship (Chen et al 2018;Motato-Vásquez et al 2020;Wang et al 2021). Due to differences in morphological features of the basidiome, such as its resupinate and effused habit and uniform, light-colored context lacking a dark brown zone or black line between the tube layer and subiculum, researchers refrained from transferring C. carnegieae to Bjerkandera pending more data (Motato-Vásquez et al 2020;Wang et al 2021).…”